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- Page 1 W A L C H E M IWAKI America Inc. WPH/WDP pH/ORP Controllers WPH/WDP Series pH & ORP Controllers Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL: 508-429-1110 FAX: 508-429-7433 WEB: www.walchem.com...
- Page 2 WALCHEM and for the purposes disclosed in writing at the time of purchase, if any. WALCHEM's liability under this warranty shall be limited to replacement or repair, F.O.B. Holliston, MA U.S.A.
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Page 3: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ........................1 SPECIFICATIONS ........................2 Measurement Performance ........................2 Electrical: Input/Output .......................... 2 Mechanical ............................. 3 WPH/WDP Variables and their Limits ....................3 UNPACKING & INSTALLATION ....................4 Unpacking the unit ..........................4 Mounting the electronic enclosure ......................4 Installation .............................. -
Page 4: Introduction
INTRODUCTION The Walchem WPH Series single sensor input and WDP Series dual sensor input controllers are wall mount pH/ORP controllers that are available in on/off or modulated pulse proportional versions. They are available with four on/off control relays (WPH410 or WDP410) with two modulated pulse proportional output and two dry contact relays (WPH420 or WDP420) or four modulated pulse proportional outputs (WDP440). -
Page 5: Specifications
SPECIFICATIONS Measurement Performance pH Range -2 to 16 pH units pH Resolution 0.0015 pH units (0.01 pH displayed) pH Accuracy (Calibrated): ± .01 pH ORP Range -1500 to 1500 mV ORP Resolution 92 µV (1mV displayed) ORP Accuracy ±1 mV Temp Comp (optional): 100 or 1000 ohm platinum RTD Temperature Range... -
Page 6: Mechanical
Mechanical Enclosure Material Polycarbonate NEMA Rating NEMA 4X Dimensions 8.5" x 6.5" x 5.5" Display 2 x 16 character backlit liquid crystal Operating Ambient Temp 32 – 122°F (0 – 50°C) Storage Temperature -20 – 180°F (-29 – 80°C) Flow switch manifold temperature rating 140°F (60°C) max Flow switch manifold pressure rating 150 psi... -
Page 7: Unpacking & Installation
Mounting the electronic enclosure The WPH/WDP series controller is supplied with mounting holes on the enclosure. It should be wall mounted with the display at eye level, on a vibration-free surface, utilizing all four mounting holes for maximum stability. -
Page 8: Icon Definitions
For submersion applications, mount the electrode below the minimum solution level. If the tank will be completely emptied, plan on removing the electrode and storing it in tap water (NOT DI water) or pH 4 buffer solution while the tank is empty. If this is not desirable, a recirculation loop may be installed with the electrode mounted in-line. - Page 9 Installation with Submersion Electrode pH/ORP Controller W A L C H E M FLOW IN FLOW OUT AC POWER SUBMERSION ELECTRODE ACID BASE PROBE COOLING TOWER SOLENOID VALVE WATER METER Flow Switch Flow switch pH/ORP Controller W A L C H E M Electrode Electrode CIRCULATING...
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Page 10: Electrical Installation
Electrical installation The various standard wiring options are shown in figure 2. Your WPH/WDP series controller will arrive from the factory prewired or ready for hardwiring. Depending on your configuration of controller options, you may be required to hardwire some or all of the input/output devices. Refer to figures 3 and 4 for circuit board layout and wiring. - Page 11 4-20mA #1 4-20mA #2 (OPTIONAL) (OPTIONAL) pH/ORP SENSOR ALARM POWER PLUG FLOW SWITCH CTRL 1 (OPTIONAL) CTRL 2 CTRL 3 CTRL 4 Figure 2b WPH420 Conduit Wiring CTRL 4 FLOW SWITCH 2 4-20mA 1 pH/ORP 1 FLOW POWER CTRL 3 4-20mA 2 SWITCH 1 pH/ORP 2...
- Page 12 FLOW SWITCH 2 4-20mA 1 ALARM pH/ORP 1 PLUG 4-20mA 2 FLOW POWER CTRL 2 CTRL 1 SWITCH 1 pH/ORP 2 CTRL 3 CTRL 4 Figure 2e WDP440 Conduit Wiring...
- Page 13 BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD L1 L2/N DIG IN 2 DIG IN 3 DIG IN 4 DIG IN 5 DIG IN 1 IN+ IN- IN+ IN- IN+ IN- WHT 120V...
- Page 14 BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD L1 L2/N DIG IN 2 DIG IN 3 DIG IN 4 DIG IN 5 DIG IN 1 IN+ IN- IN+ IN- IN+ IN- WHT 120V...
- Page 15 BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD L1 L2/N DIG IN 2 DIG IN 3 DIG IN 4 DIG IN 5 DIG IN 1 IN+ IN- IN+ IN- IN+ IN- WHT 120V...
- Page 16 BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD L1 L2/N DIG IN 2 DIG IN 3 DIG IN 4 DIG IN 5 DIG IN 1 IN+ IN- IN+ IN- IN+ IN- SYSTEM A...
- Page 17 Chart Recorder BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N (WPH410 only) GROUND STUD GRN 120V GRN/YEL 240V Note: CTR3, CTRL 4 and Alarm are dry contact relays (polarity not critical). CTRL 1 CTRL 2 CTRL 3...
- Page 18 Chart Recorder BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD Note: CTRL 3, CTRL 4 and Alarm are dry contact relays (polarity not critical). CTRL 1 CTRL 2 CTRL 3 CTRL 4...
- Page 19 Chart Chart Recorder Recorder BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD GRN 120V GRN 120V GRN/YEL 240V GRN/YEL 240V CTRL 1 CTRL 2 CTRL 3 CTRL 4 ALARM L2/N...
- Page 20 Chart Chart Recorder Recorder BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD Note: Alarm is a dry contact relay (polarity not critical). CTRL 1 CTRL 2 CTRL 3 CTRL 4 ALARM...
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